No sign shall be located less than ten feet (10') from a street line; provided, however, if an established setback, wall, hedge, precipitous slope, or shrubbery exists, and such setback is less than ten feet (10'), or such wall, hedge, slope, or shrubbery is more than three feet (3') high and nearer the street line than ten feet (10'), a sign may be placed in front of and against the structure, wall, hedge, slope, or shrubbery. (Ord. 80-O-1775, eff. 12-5-1980)